Adiabatic cooling of a tunable Bose-Fermi mixture in an optical lattice

Details Adiabatic cooling of a tunable Bose-Fermi mixture in an optical lattice Adiabatic cooling of a tunable Bose-Fermi mixture in an optical lattice

2009-01-23

arxiv.org/abs/0901.3625v2

Phys. Rev. A 79, 063615 (2009)

Physics

Condensed Matter

Other Condensed Matter

10 pages, 7 figures

Scientific paper

10.1103/PhysRevA.79.063615

We consider an atomic Fermi gas confined in a uniform optical lattice potential, where the atoms can pair into molecules via a magnetic field controlled narrow Feshbach resonance. Thus by adjusting the magnetic field the portion of fermionic and bosonic particles in the system can be continuously varied. We analyze the statistical mechanics of this system and consider the interplay of the lattice physics with the atom-molecule conversion. We study the entropic behavior of the system and characterize the temperature changes that occur during adiabatic ramps across the Feshbach resonance. We show that an appropriate choice of filling fraction can be used to reduce the system temperature during such ramps.

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